Bay Curious listener Kristin Seitz was looking at a map of San Jose when she noticed an awful lot of holes. The city's territory isn't one undivided shape, but rather resembles a piece of Swiss cheese. Seitz wondered: Why are there so many unincorporated "urban islands" in the San Jose area?

Reported by Ericka Cruz-Guevarra. Produced and edited by Olivia Allen-Price, Vinnee Tong, Paul Lancour and Julia McEvoy. Theme music by Pat Mesiti-Miller.

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